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(No Model.) Sheets-Sheet 1. I

E. 'I'. GREENFIELD.

STAPLING MACHINE. No. 572,293. Patented 1166.1, 1896.

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Suva/wko@ M1@ s@ 1w@ y UNITED STATES PATENT OFFICE. y

EDYIN T. GREENFIELI), OF NEW YORK, N. Y., ASSIGNOR TO THE GREEN- FIELDAUTOMATIC FASTENER COMPANY, OF SAME PLACE.

MACHINE.

SPECIFICATION forming part of Letters Patent No. 572,293, dated December1, 1896.

Application filed November 16, 1894. Renewed January 9, 1896. Serial No.574,916.

14,1895,No.116,040,l in Canada August 2, 1895,110. 49,588,

T all whom it may concern:

Be it known that I, EDWIN T. GREENEIELD, a citizen of the United States,residing at New` York, in the county of New York and State of New York,have made a new and useful Invention in Stapling-lviachines, of whichthe following is a specification.

My invention is directed particularly to improvements instapling-machines which Io sever and simultaneously drive-staples from ametallic strip of formed staples which are united together andaresevered one by one and driven through the material to be bound or heldby the driven staple; and to this end it consists, first, in the novelmechanism hereinafter described for simultaneously severing and drivingstaples one at a time from a strip of formed staples united together attheir backs; second, in the novel means for hold- 2o ing the'supply ofunited staples as they are fed forward for use, and, third, in thedetails of construction hereinafter described, all of the novel pointsof my invention being particularly pointed out in the claims at the endof this specification. l

The mechanism for severing, driving, and clenching previously formed orprepared staples as hereinafter described and claimed has been patentedvto me in the following-named 3o foreign countries,to wit: Belgiu m,No.116,040, dated June 14, 1895; Canada, N o. 49,588, dated August 2,1895,and France, No. 248,107, dated October 5, 1895. I also filed anapplication for a patent upon said apparatus in Great Britain on June 5,1895, No. 11,091,t

and in Austria on June 11, 1895. Said invention has not,however, beenpatented to me or with my knowledge and consent in any other countriesthan those hereinbefore re- 4o ferred to; y 4 5 My invention will befully understood by` referring to the accompanying drawings, in whichFigure 1 is a side elevational view of a complete machine embodying myimprovements, illustrating also in dotted lines the position of thepivoted portion of the machine in the act of feeding the supply ofstaples forward. Fig. 2 is a-A Vertical sectional view taken 5o throughthe body of the machine on the line `(No model.) Patented in Belgium J'une and in France October 5, 1895,1Io. 248,107.

2 2, Fig. 3, and as seen looking from left to right in the direction ofthe arrows upon that gure. Fig. 3 is a transverse sectional View takenthrough the body of the machine on the line 3 3, Fig. 2, and as seenlooking from right to left in the direction of the arrows upon thatligure of the drawings.- Fig. 4is asimilar transverse sectional viewtaken through Fig. 2 on the line 4 4. Fig. 5 is a perspective View ofpreviously-prepared staples united together in strip form. Fig. 6 is anenlarged perspective view of the stationary portion of theclenching-anvil. Fig. 7 is a similar enlarged perspective view of themovable portion of the clenching-anvil. Figs. 8 and 9'are enlargedtransverse section al views of the staple driving and staple clenchingapparatus, taken on the line 3 3, Fig. 2, the former indicating the actof severing and driving a staple and the latter the completed act ofclenching it through the material to be bound or held.

Referring nowv to the drawings in detail, in

all of which like letters of reference represent like parts whereverused, B represents the base of the machine, which is preferably of castmetal and is provided with a pair of lugs or ears b b', to which ispivoted by a screwrod r the frame or support G for the stapleseveringand staple-driving apparatus.

H2 is a spiral rod secured to one end of the frame G and adapted tosustain a strip of pre# pared staples S as they are fed forward, by afeed-wheel R, through a guideway formed between the frame G and adetachable part G', the latter being secured to the former, by de`tachable side plates G3 G3.. This guideway is p iu the nature of alongitudinal rib of substantially the same conformation as the completedstaples and is so located that as the strip of staples is fed forwardthey straddle it and are held firmly in position, as is clearlyillustrated in Fig..4 of the drawings.

P is the staple-severing and staple-driving plunger having verticalmovement in the body of the frame G, which movement is regulated in onedirection by a stop-rod n and in the other direction by a set-screw oupon the opposite flattened faces O and o of the plunger. The lower andinner edge 7c of this plunger is IOO ,clearly shown in Fig. 2.

in the nature of a knife-edge and is adapted to shear off one of thestaples S' from the next adjoining staple as it is forced past thecutting edge of the part G'.

P2 is a strong spiral spring surrounding the 2 A ried by the fixed anvilF bearing, respectively, against the upper portion of the frame G andthe under portion of A upper end of the plunger P, its opposite ends theoperating-handle C. The feed-wheel R is frictionally journaled upon thescrew-rod Vr by a cup-shaped washer W (see Fig. 4) and is operated by apropelling-pawl R', secured to the part G', said pawl being adapted tofeed the staple-strip S forward one step at a time arf-ter the machineis vtilted into the positionV shown in dotted lines.

under side of the base B by screws and so arranged that its free oryielding end willcome into cont-act with the teeth of the feed-wheel Ras the pivoted part of the apparatus is ltil-ted into the position shownin dotted lines in Fig.

1, and R' is a check-pawl secured to the under upon a stron g Vspiralspring g2 when the parts va-re put together `and the stationaryanvilsecured by screw-threads in the base B, Aas The movable anvil G2,is provided with a lateral slit g4, in which the .ends `.of thecross-arm F' are located.

g5 gare inclined faces in the upper surface of the part G', adapted togive to the free ends of the staple S", after it is severed and drivenforward, an inward inclination, and `g2 g2 are similarly-inclined facesin the upper part of the movable anvil *.G2, adapted to give to the freelends of said staple S' a further inward movement as it is forcedforward.

lows: The strip of prepared staples S having been placed upon the spiralrod 1412 in the manner shown in Fig. 1, so that the inner staple liesdirectly under the knife-edge k of the plunge-r P, and the material M tobe bound y joins the staples S' together it severs the' first staple.and the plunger causes it to be driven forward 'until the free ends S'S' are bent inward slightly :by the inclined faces g5 g5. Afurtherforward movement of the plunger causes the staple to pass through thematerial M until the ends come into contact with the inner inclinedfaces g2 g3 of the yielding or spring-seated anvil G2, thus bending Ythem intothe position shown in Fig. S. A further forward movement causesthe springseated anvil to be forced forward against the action of thestrong spiral spring y2 until the ends of the staples S S' come intocontact with the inclined faces ff of the arm F', car- This lastmovement turns the ends of the staple inward to such an extent that theynow are in-position to be forced upward against the under face of thematerial M by the upper surface of the fixed anvil F in the manner shownin Fig 9, the strong spiral spring fnl/2 being now compressed to itslowest position. Immediately after the blow thus given by the operator 1the spiral spring P2 restores the plungerP to its uppermost position,and in like manner R2 is a yielding feeding-pawl secured to the thestrong spiral spring y2 under the yielding-anvil G2 restores it tonormal position, as shown in Fig. 2.l The body part or frame G is nowtilted into the position shown in dotted lines in Fig. 1 and thematerial to be bound placed in position for the next succeeding staple.As the frame wastilted into the position shown in dotted lines in Fig. 1the end of the yielding feed-pawl R2 came into contact with the teethjust above it and imparted to ita forward motion sufficient to feed thestrip forward until the next staple to be sevv ered came into contactwith the inner face of the guideway for the plunger and thus checked itsforward movement, leaving said staple in position to be severed .uponthe next downward motion of the plunger P. At the same time thecheck-pawl R', by reason of the rotation of the feed-wheel R, fell intoposition between the next succeeding pair of teeth .of said wheel.Should the yoperator rotate the pivoted part of the .machine again intothe position shown in dotted lines in Fig. 1 before the staple now inposition is severed, the yielding nature of the feed-pawl R' will notpermit it to force the strip forward until a` staple has been severed.At the same time the check-pawl R' wil-l maintain the feed-wheel in theposition in which The operation of .the mechanism is as folit was lastleft by reason of its frictional bearing upon the teeth of that wheel.

I make no claim inthe present .application to this type of feedingapparatus, which operates only after a staple has been severed, as thissubject-matter broadly constitutes in part the subject-matter of anotherapplication filed of even date herewith and bearing Serial No. 574,915,and is only shown and described in .the prese-nt application for thepurposeofAill-ustratinga complete and operative machine embodying thisfeature in connection with other features hereinbefore described andhereinafter claimed.

1 do not limit myself to the special details of constructionhereinbefore described for severing and driving staples from astrip ofprepared staples, as it is obvious that many of the details ofconstruction might be materially departed from and still come within thescope of my claims hereinafter made.

To make a single illustration, although I IOO IIO

have shown a spiral rod H2, which acts in the nature of a reservoir orsupport or chamber for the staple-binding material S, it is obvious thatthis specific form of apparatus might be modified in many ways and stillY com e within the scope of my claims hereinafter made, so long as thearrangement of the support, chamber, or reservoir for the stapleformingmaterial be in the nature of a spiral guideway which causes the materialto be held in compact form in the manner shown. It is also obvious thatthis form of reservoir or support or chamberfor the staple-formingmaterial might be modied to suit different types of staple-formingmaterial, such as Wire and other types of material in which thestaple-blanks are united together and stored in quantity for use aswanted, and still come Within the scope of my invention.

I make no claim in the present application to a staple -strip consistingof a series of formed staples united together by a narrow web at theirbacks, such as is shown in Fig. 5 of the accompanying drawings, as thisfeature is claimed as an article of manufacture in a separateapplication iiled by me in the United States Patent Oflice on the 26thday of December, 1895, and bearing Serial No. 573,341.

Havingthus described my invention, what I claim, and desire to secure byLetters Patent of the United States, is-

l. In a stapling-machine a spirally-disposed support adapted to sustaina strip of united staples, the distance between the convolutions of saidsupport being greater than the length of the legs of the staple.

2. In a stapling-machine a spirally-disposed support adapted to sustaina strip of united staples in combination with feeding mechanism adaptedto feed the material forward and a plunger adapted to shear off anddrive a single staple at each operation, the

distance between the convolutions of the spirally-disposed support beinggreater than the length of the legs of the staples.

3. A stapling-machine provided with mechanism for feeding forward astrip of completed staples, a single plunger for severing and drivingone staple at a time and a clenching-anvil for clenching the staple uponthe under side of the material to be bound, said feeding mechanism beingcarried by an arm pivoted to the base of the machine and provided withmeans for preventing the forward movement of the completed strip ofstaples, and additional yielding means which is brought into actionafter the strip of staples is checked in its forward movement and isthereby adapted to feed the strip forward only after each completeoperation, substantially as described. n

4. A stapling-machine provided with mechanism for feeding a strip ofcompleted staples forward as they are used one at a time, a singlestaple-severing and staple-driving plunger, said feeding mechanism andplunger being carried by an arm pivotally secured to the base of themachine, in combination with a yieldingly-supported anvil adapted tobend the inner ends of the staple inward as they are driven through thematerial to be bound; a stationary or fixed anvil adapted to clench theends into the under surface of the material at the completion of thestroke of the plunger, means for preventing the forward movement of thestaple-strip after a staple has been placed in position beneath theplunger, and a yielding attachment in connection with the feedingmechanism which permits said feeding mechanism to yield after thestaple-strip has been checked in its forward movement.

5. A staplingmachine provided with a single plunger adapted to sever anddrive one staple at a time from a strip of completed staples; aclenching-anvil for clenching the free ends of the staples upon theunder side of the material to be bound; checking or holding means forpreventing forward movement of the completed strip of staples when astaple is in position to be severed and driven therefrom; additionalyielding means acting in conjunction with the feeding mechanism andadapted to prevent the latter from forcing the staple-strip forwardafter it is held by the checking or holding means.

In testimony whereof I have hereunto subi scribed my name this 15th dayof November,

EDWIN T. GREEN FIELD. W'itnesses:

C. J. KINTNER, M. M. ROBINSON.

